18879958 has 8 divisors (see below), whose sum is σ = 29810520. Its totient is φ = 8943120.

The previous prime is 18879919. The next prime is 18880007. The reversal of 18879958 is 85997881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18879899 and 18879908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248383 + ... + 248458.

It is an arithmetic number, because the mean of its divisors is an integer number (3726315).

Almost surely, 2^18879958 is an apocalyptic number.

18879958 is a deficient number, since it is larger than the sum of its proper divisors (10930562).

18879958 is a wasteful number, since it uses less digits than its factorization.

18879958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496862.

The product of its digits is 1451520, while the sum is 55.

The square root of 18879958 is about 4345.1073634607. The cubic root of 18879958 is about 266.2770118142.

The spelling of 18879958 in words is "eighteen million, eight hundred seventy-nine thousand, nine hundred fifty-eight".